The radius of the wheel of a car is 7 cm and the wheel makes 10 revolutions in 15 seconds. Then the speed of the wheel is?
Answers
Answer:
Radius of wheel = 70 cm.
Circumference of wheel = 2πr
➡ 2 × 22/7 × 70 = 440 cm
➡ 4400 cm = 4•4 m
Distance covered in 1 revolution = circumference of wheel.
➡ Distance covered in 1 revolution=4•4m
➡ Distance covered in 10 revolution = 4•4 × 10 = 44 m
Now,
It is given that wheel makes 10 revolutions in 5 seconds.
so,
Speed = distance/time
Speed = 44/5 = 8•8 m/s
Answer :-
Speed of the wheel is 8•8 m/s.
Hope it will help you !!!
Step-by-step explanation:
Given: Radius of wheel = 7cm
Number of revolution = 10
Time = 15 seconds
To find: speed of the wheel
Solution:
circumference of the wheel = 2πr ( where r is the radius of the wheel)
= 2×22/7×7 = 44cm = 0.44m
Distance covered in 1 revolution will be equal to the circumference of the wheel.
Therefore in one revolution, the distance covered will be 0.44m
So in 10 revolutions, the distance covered will be 0.44×10 = 4.4m
Now as per the question, the time take to revolve 10 times is 15 seconds
Therefore, speed = distance/time
= 4.4/15 = 0.88 ms⁻¹
Therefore, the speed of the wheel is 0.88 ms⁻¹
- It is an example of circular motion. Circular motion is a periodic motion in which the body moves in a circular path that is the distance from a fixed point remains constant.